Hey all well i have a fusion jonah lomu 15" sub and a concept 2400d amp which is wired to 2 ohms and puts out about 1500 rms @12 volts. Now im looking to get a bit more out of my sub. The box i have is3.6cuft internal volume and its tuned to 35 htz.....the resonant frequency in my car is about 50 htz...could someone help me design a new box hopefully about the same size or smaller and a huge slot port??...any help would be awsmome..phil

Oh and currently the box was facing the back as well as the port but today i changed it around and faced it forward with the port and it sounded much quieter....so i guess ill have to face it back again...phil

Dalm no edit: i was also thinking fo selling the fusion and getting a 15"xxx re would there be a gain that anyone can think of or no???phil